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Finding the Fourth Proportional to 702,000.60, 1,053,000.90 and 688,003.80

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Solution

The fourth proportional to 702,000.60, 1,053,000.90 and 688,003.80 is: 1,032,005.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    702,000.60 : 1,053,000.90 = 688,003.80 : x
  2. Step 2: Convert to fraction form
    702,000.60/1,053,000.90 = 688,003.80/x
  3. Step 3: Cross multiply
    702,000.60x = 1,053,000.90 × 688,003.80
  4. Step 4: Simplify right side
    702,000.60x = 724,468,620,603.42
  5. Step 5: Solve for x
    x = 724,468,620,603.42/702,000.60
  6. Step 6: Final answer
    x = 1,032,005.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.